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2bb5afc3db
This brings it in line with std::optional. My recent changes to make Optional of trivial types trivially copyable introduced diverging behavior depending on the type, which is bad. Now all types have the same moving behavior. llvm-svn: 323445
531 lines
16 KiB
C++
531 lines
16 KiB
C++
//===- llvm/unittest/ADT/OptionalTest.cpp - Optional unit tests -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/Optional.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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struct NonDefaultConstructible {
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static unsigned CopyConstructions;
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static unsigned Destructions;
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static unsigned CopyAssignments;
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explicit NonDefaultConstructible(int) {
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}
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NonDefaultConstructible(const NonDefaultConstructible&) {
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++CopyConstructions;
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}
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NonDefaultConstructible &operator=(const NonDefaultConstructible&) {
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++CopyAssignments;
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return *this;
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}
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~NonDefaultConstructible() {
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++Destructions;
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}
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static void ResetCounts() {
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CopyConstructions = 0;
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Destructions = 0;
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CopyAssignments = 0;
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}
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};
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unsigned NonDefaultConstructible::CopyConstructions = 0;
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unsigned NonDefaultConstructible::Destructions = 0;
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unsigned NonDefaultConstructible::CopyAssignments = 0;
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// Test fixture
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class OptionalTest : public testing::Test {
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};
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TEST_F(OptionalTest, NonDefaultConstructibleTest) {
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Optional<NonDefaultConstructible> O;
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EXPECT_FALSE(O);
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}
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TEST_F(OptionalTest, ResetTest) {
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NonDefaultConstructible::ResetCounts();
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Optional<NonDefaultConstructible> O(NonDefaultConstructible(3));
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EXPECT_EQ(1u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(1u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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O.reset();
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(1u, NonDefaultConstructible::Destructions);
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}
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TEST_F(OptionalTest, InitializationLeakTest) {
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NonDefaultConstructible::ResetCounts();
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Optional<NonDefaultConstructible>(NonDefaultConstructible(3));
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EXPECT_EQ(1u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(2u, NonDefaultConstructible::Destructions);
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}
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TEST_F(OptionalTest, CopyConstructionTest) {
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NonDefaultConstructible::ResetCounts();
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{
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Optional<NonDefaultConstructible> A(NonDefaultConstructible(3));
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EXPECT_EQ(1u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(1u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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Optional<NonDefaultConstructible> B(A);
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EXPECT_EQ(1u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(0u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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}
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(2u, NonDefaultConstructible::Destructions);
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}
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TEST_F(OptionalTest, ConstructingCopyAssignmentTest) {
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NonDefaultConstructible::ResetCounts();
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{
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Optional<NonDefaultConstructible> A(NonDefaultConstructible(3));
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Optional<NonDefaultConstructible> B;
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EXPECT_EQ(1u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(1u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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B = A;
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EXPECT_EQ(1u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(0u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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}
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(2u, NonDefaultConstructible::Destructions);
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}
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TEST_F(OptionalTest, CopyingCopyAssignmentTest) {
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NonDefaultConstructible::ResetCounts();
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{
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Optional<NonDefaultConstructible> A(NonDefaultConstructible(3));
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Optional<NonDefaultConstructible> B(NonDefaultConstructible(4));
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EXPECT_EQ(2u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(2u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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B = A;
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(1u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(0u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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}
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(2u, NonDefaultConstructible::Destructions);
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}
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TEST_F(OptionalTest, DeletingCopyAssignmentTest) {
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NonDefaultConstructible::ResetCounts();
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{
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Optional<NonDefaultConstructible> A;
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Optional<NonDefaultConstructible> B(NonDefaultConstructible(3));
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EXPECT_EQ(1u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(1u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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B = A;
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(1u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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}
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(0u, NonDefaultConstructible::Destructions);
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}
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TEST_F(OptionalTest, NullCopyConstructionTest) {
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NonDefaultConstructible::ResetCounts();
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{
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Optional<NonDefaultConstructible> A;
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Optional<NonDefaultConstructible> B;
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(0u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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B = A;
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(0u, NonDefaultConstructible::Destructions);
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NonDefaultConstructible::ResetCounts();
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}
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EXPECT_EQ(0u, NonDefaultConstructible::CopyConstructions);
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EXPECT_EQ(0u, NonDefaultConstructible::CopyAssignments);
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EXPECT_EQ(0u, NonDefaultConstructible::Destructions);
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}
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TEST_F(OptionalTest, GetValueOr) {
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Optional<int> A;
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EXPECT_EQ(42, A.getValueOr(42));
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A = 5;
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EXPECT_EQ(5, A.getValueOr(42));
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}
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struct MultiArgConstructor {
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int x, y;
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MultiArgConstructor(int x, int y) : x(x), y(y) {}
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explicit MultiArgConstructor(int x, bool positive)
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: x(x), y(positive ? x : -x) {}
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MultiArgConstructor(const MultiArgConstructor &) = delete;
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MultiArgConstructor(MultiArgConstructor &&) = delete;
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MultiArgConstructor &operator=(const MultiArgConstructor &) = delete;
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MultiArgConstructor &operator=(MultiArgConstructor &&) = delete;
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static unsigned Destructions;
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~MultiArgConstructor() {
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++Destructions;
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}
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static void ResetCounts() {
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Destructions = 0;
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}
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};
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unsigned MultiArgConstructor::Destructions = 0;
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TEST_F(OptionalTest, Emplace) {
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MultiArgConstructor::ResetCounts();
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Optional<MultiArgConstructor> A;
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A.emplace(1, 2);
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EXPECT_TRUE(A.hasValue());
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EXPECT_EQ(1, A->x);
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EXPECT_EQ(2, A->y);
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EXPECT_EQ(0u, MultiArgConstructor::Destructions);
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A.emplace(5, false);
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EXPECT_TRUE(A.hasValue());
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EXPECT_EQ(5, A->x);
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EXPECT_EQ(-5, A->y);
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EXPECT_EQ(1u, MultiArgConstructor::Destructions);
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}
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struct MoveOnly {
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static unsigned MoveConstructions;
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static unsigned Destructions;
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static unsigned MoveAssignments;
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int val;
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explicit MoveOnly(int val) : val(val) {
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}
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MoveOnly(MoveOnly&& other) {
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val = other.val;
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++MoveConstructions;
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}
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MoveOnly &operator=(MoveOnly&& other) {
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val = other.val;
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++MoveAssignments;
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return *this;
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}
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~MoveOnly() {
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++Destructions;
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}
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static void ResetCounts() {
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MoveConstructions = 0;
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Destructions = 0;
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MoveAssignments = 0;
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}
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};
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unsigned MoveOnly::MoveConstructions = 0;
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unsigned MoveOnly::Destructions = 0;
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unsigned MoveOnly::MoveAssignments = 0;
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TEST_F(OptionalTest, MoveOnlyNull) {
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MoveOnly::ResetCounts();
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Optional<MoveOnly> O;
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EXPECT_EQ(0u, MoveOnly::MoveConstructions);
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EXPECT_EQ(0u, MoveOnly::MoveAssignments);
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EXPECT_EQ(0u, MoveOnly::Destructions);
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}
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TEST_F(OptionalTest, MoveOnlyConstruction) {
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MoveOnly::ResetCounts();
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Optional<MoveOnly> O(MoveOnly(3));
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EXPECT_TRUE((bool)O);
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EXPECT_EQ(3, O->val);
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EXPECT_EQ(1u, MoveOnly::MoveConstructions);
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EXPECT_EQ(0u, MoveOnly::MoveAssignments);
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EXPECT_EQ(1u, MoveOnly::Destructions);
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}
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TEST_F(OptionalTest, MoveOnlyMoveConstruction) {
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Optional<MoveOnly> A(MoveOnly(3));
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MoveOnly::ResetCounts();
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Optional<MoveOnly> B(std::move(A));
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EXPECT_TRUE((bool)A);
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EXPECT_TRUE((bool)B);
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EXPECT_EQ(3, B->val);
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EXPECT_EQ(1u, MoveOnly::MoveConstructions);
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EXPECT_EQ(0u, MoveOnly::MoveAssignments);
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EXPECT_EQ(0u, MoveOnly::Destructions);
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}
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TEST_F(OptionalTest, MoveOnlyAssignment) {
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MoveOnly::ResetCounts();
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Optional<MoveOnly> O;
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O = MoveOnly(3);
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EXPECT_TRUE((bool)O);
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EXPECT_EQ(3, O->val);
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EXPECT_EQ(1u, MoveOnly::MoveConstructions);
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EXPECT_EQ(0u, MoveOnly::MoveAssignments);
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EXPECT_EQ(1u, MoveOnly::Destructions);
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}
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TEST_F(OptionalTest, MoveOnlyInitializingAssignment) {
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Optional<MoveOnly> A(MoveOnly(3));
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Optional<MoveOnly> B;
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MoveOnly::ResetCounts();
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B = std::move(A);
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EXPECT_TRUE((bool)A);
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EXPECT_TRUE((bool)B);
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EXPECT_EQ(3, B->val);
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EXPECT_EQ(1u, MoveOnly::MoveConstructions);
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EXPECT_EQ(0u, MoveOnly::MoveAssignments);
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EXPECT_EQ(0u, MoveOnly::Destructions);
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}
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TEST_F(OptionalTest, MoveOnlyNullingAssignment) {
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Optional<MoveOnly> A;
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Optional<MoveOnly> B(MoveOnly(3));
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MoveOnly::ResetCounts();
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B = std::move(A);
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EXPECT_FALSE((bool)A);
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EXPECT_FALSE((bool)B);
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EXPECT_EQ(0u, MoveOnly::MoveConstructions);
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EXPECT_EQ(0u, MoveOnly::MoveAssignments);
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EXPECT_EQ(1u, MoveOnly::Destructions);
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}
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TEST_F(OptionalTest, MoveOnlyAssigningAssignment) {
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Optional<MoveOnly> A(MoveOnly(3));
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Optional<MoveOnly> B(MoveOnly(4));
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MoveOnly::ResetCounts();
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B = std::move(A);
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EXPECT_TRUE((bool)A);
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EXPECT_TRUE((bool)B);
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EXPECT_EQ(3, B->val);
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EXPECT_EQ(0u, MoveOnly::MoveConstructions);
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EXPECT_EQ(1u, MoveOnly::MoveAssignments);
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EXPECT_EQ(0u, MoveOnly::Destructions);
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}
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struct Immovable {
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static unsigned Constructions;
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static unsigned Destructions;
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int val;
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explicit Immovable(int val) : val(val) {
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++Constructions;
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}
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~Immovable() {
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++Destructions;
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}
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static void ResetCounts() {
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Constructions = 0;
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Destructions = 0;
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}
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private:
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// This should disable all move/copy operations.
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Immovable(Immovable&& other) = delete;
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};
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unsigned Immovable::Constructions = 0;
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unsigned Immovable::Destructions = 0;
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TEST_F(OptionalTest, ImmovableEmplace) {
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Optional<Immovable> A;
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Immovable::ResetCounts();
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A.emplace(4);
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EXPECT_TRUE((bool)A);
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EXPECT_EQ(4, A->val);
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EXPECT_EQ(1u, Immovable::Constructions);
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EXPECT_EQ(0u, Immovable::Destructions);
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}
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#if LLVM_HAS_RVALUE_REFERENCE_THIS
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TEST_F(OptionalTest, MoveGetValueOr) {
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Optional<MoveOnly> A;
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MoveOnly::ResetCounts();
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EXPECT_EQ(42, std::move(A).getValueOr(MoveOnly(42)).val);
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EXPECT_EQ(1u, MoveOnly::MoveConstructions);
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EXPECT_EQ(0u, MoveOnly::MoveAssignments);
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EXPECT_EQ(2u, MoveOnly::Destructions);
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A = MoveOnly(5);
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MoveOnly::ResetCounts();
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EXPECT_EQ(5, std::move(A).getValueOr(MoveOnly(42)).val);
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EXPECT_EQ(1u, MoveOnly::MoveConstructions);
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EXPECT_EQ(0u, MoveOnly::MoveAssignments);
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EXPECT_EQ(2u, MoveOnly::Destructions);
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}
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#endif // LLVM_HAS_RVALUE_REFERENCE_THIS
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struct EqualTo {
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template <typename T, typename U> static bool apply(const T &X, const U &Y) {
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return X == Y;
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}
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};
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struct NotEqualTo {
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template <typename T, typename U> static bool apply(const T &X, const U &Y) {
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return X != Y;
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}
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};
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struct Less {
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template <typename T, typename U> static bool apply(const T &X, const U &Y) {
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return X < Y;
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}
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};
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struct Greater {
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template <typename T, typename U> static bool apply(const T &X, const U &Y) {
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return X > Y;
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}
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};
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struct LessEqual {
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template <typename T, typename U> static bool apply(const T &X, const U &Y) {
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return X <= Y;
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}
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};
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struct GreaterEqual {
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template <typename T, typename U> static bool apply(const T &X, const U &Y) {
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return X >= Y;
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}
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};
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template <typename OperatorT, typename T>
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void CheckRelation(const Optional<T> &Lhs, const Optional<T> &Rhs,
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bool Expected) {
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EXPECT_EQ(Expected, OperatorT::apply(Lhs, Rhs));
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if (Lhs)
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EXPECT_EQ(Expected, OperatorT::apply(*Lhs, Rhs));
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else
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EXPECT_EQ(Expected, OperatorT::apply(None, Rhs));
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if (Rhs)
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EXPECT_EQ(Expected, OperatorT::apply(Lhs, *Rhs));
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else
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EXPECT_EQ(Expected, OperatorT::apply(Lhs, None));
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}
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struct EqualityMock {};
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const Optional<EqualityMock> NoneEq, EqualityLhs((EqualityMock())),
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EqualityRhs((EqualityMock()));
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bool IsEqual;
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bool operator==(const EqualityMock &Lhs, const EqualityMock &Rhs) {
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EXPECT_EQ(&*EqualityLhs, &Lhs);
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EXPECT_EQ(&*EqualityRhs, &Rhs);
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return IsEqual;
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}
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TEST_F(OptionalTest, OperatorEqual) {
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CheckRelation<EqualTo>(NoneEq, NoneEq, true);
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CheckRelation<EqualTo>(NoneEq, EqualityRhs, false);
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CheckRelation<EqualTo>(EqualityLhs, NoneEq, false);
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IsEqual = false;
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CheckRelation<EqualTo>(EqualityLhs, EqualityRhs, IsEqual);
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IsEqual = true;
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CheckRelation<EqualTo>(EqualityLhs, EqualityRhs, IsEqual);
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}
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TEST_F(OptionalTest, OperatorNotEqual) {
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CheckRelation<NotEqualTo>(NoneEq, NoneEq, false);
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CheckRelation<NotEqualTo>(NoneEq, EqualityRhs, true);
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CheckRelation<NotEqualTo>(EqualityLhs, NoneEq, true);
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IsEqual = false;
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CheckRelation<NotEqualTo>(EqualityLhs, EqualityRhs, !IsEqual);
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IsEqual = true;
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CheckRelation<NotEqualTo>(EqualityLhs, EqualityRhs, !IsEqual);
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}
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struct InequalityMock {};
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const Optional<InequalityMock> NoneIneq, InequalityLhs((InequalityMock())),
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InequalityRhs((InequalityMock()));
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bool IsLess;
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bool operator<(const InequalityMock &Lhs, const InequalityMock &Rhs) {
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EXPECT_EQ(&*InequalityLhs, &Lhs);
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EXPECT_EQ(&*InequalityRhs, &Rhs);
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return IsLess;
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}
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TEST_F(OptionalTest, OperatorLess) {
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CheckRelation<Less>(NoneIneq, NoneIneq, false);
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CheckRelation<Less>(NoneIneq, InequalityRhs, true);
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CheckRelation<Less>(InequalityLhs, NoneIneq, false);
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IsLess = false;
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CheckRelation<Less>(InequalityLhs, InequalityRhs, IsLess);
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IsLess = true;
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CheckRelation<Less>(InequalityLhs, InequalityRhs, IsLess);
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}
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TEST_F(OptionalTest, OperatorGreater) {
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CheckRelation<Greater>(NoneIneq, NoneIneq, false);
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CheckRelation<Greater>(NoneIneq, InequalityRhs, false);
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CheckRelation<Greater>(InequalityLhs, NoneIneq, true);
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|
IsLess = false;
|
|
CheckRelation<Greater>(InequalityRhs, InequalityLhs, IsLess);
|
|
IsLess = true;
|
|
CheckRelation<Greater>(InequalityRhs, InequalityLhs, IsLess);
|
|
}
|
|
|
|
TEST_F(OptionalTest, OperatorLessEqual) {
|
|
CheckRelation<LessEqual>(NoneIneq, NoneIneq, true);
|
|
CheckRelation<LessEqual>(NoneIneq, InequalityRhs, true);
|
|
CheckRelation<LessEqual>(InequalityLhs, NoneIneq, false);
|
|
|
|
IsLess = false;
|
|
CheckRelation<LessEqual>(InequalityRhs, InequalityLhs, !IsLess);
|
|
IsLess = true;
|
|
CheckRelation<LessEqual>(InequalityRhs, InequalityLhs, !IsLess);
|
|
}
|
|
|
|
TEST_F(OptionalTest, OperatorGreaterEqual) {
|
|
CheckRelation<GreaterEqual>(NoneIneq, NoneIneq, true);
|
|
CheckRelation<GreaterEqual>(NoneIneq, InequalityRhs, false);
|
|
CheckRelation<GreaterEqual>(InequalityLhs, NoneIneq, true);
|
|
|
|
IsLess = false;
|
|
CheckRelation<GreaterEqual>(InequalityLhs, InequalityRhs, !IsLess);
|
|
IsLess = true;
|
|
CheckRelation<GreaterEqual>(InequalityLhs, InequalityRhs, !IsLess);
|
|
}
|
|
|
|
#if __has_feature(is_trivially_copyable) && defined(_LIBCPP_VERSION)
|
|
static_assert(std::is_trivially_copyable<Optional<int>>::value,
|
|
"Should be trivially copyable");
|
|
static_assert(
|
|
!std::is_trivially_copyable<Optional<NonDefaultConstructible>>::value,
|
|
"Shouldn't be trivially copyable");
|
|
#endif
|
|
|
|
} // end anonymous namespace
|
|
|